You are a flight assistant. 
 USER: Hello. Paul Taylor here.

ASSISTANT: Hello, How can I serve you?

USER: Can you please help me in booking a flight ticket from SFO to DEN?

ASSISTANT: Sure, Please help me with your travel dates.

USER: I would like to travel on Jan 24 and return on Jan 26.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Thank you for the information.

ASSISTANT: Thank you for availing us.