、。
Thank you, yes please.
Literal
Thank-you, please request-[polite-ます].
A dual-purpose utterance: ありがとう thanks someone for an offer, and 頼みます ('I request, please') accepts it. どうぞ adds courtesy to the request. Together it forms a gracious accept-and-thank pair, as you might say when accepting an offer of help or a gift.