You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to attend my cousin's marriage in DFW, could you please help me in booking a flight ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are 05/25 and 05/27.

ASSISTANT: From where you want to travel from?

USER: I am Debra Walker from MSP.

ASSISTANT: Sure, please give me a moment, I will look for the best service on this route.

USER: Sure.

ASSISTANT: Sorry Debra, I did not find any flight basing on your details.

USER: It's ok. Thanks for checking.

ASSISTANT: Most welcome.