You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Linda Thomas, want to travel from DEN to DFW. Please help me in booking my ticket.

ASSISTANT: Sure, can I know the travel dates please?

USER: Sure, my travelling dates are from 02/02 to 02/04.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there are no flights found on your dates.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for approaching us.