You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Edward Miller here.

ASSISTANT: Edward Miller, how may I aid you?

USER: Can you book a flight ticket for my airport codes that is from JFK to DFW?

ASSISTANT: Sure, please provide your trip dates.

USER: My travel dates are from Mar 23 Mar 25.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no flights are available on your route.

USER: Ok, that is not a problem. Thank you.

ASSISTANT: Thank you for choosing us.