You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joshua Thomas.

ASSISTANT: How can I assist you?

USER: Can you please help me in booking  a flight ticket from Orlando to Philadelphia?

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

USER: Thank you. My travel dates are 10/19 and 10/21.

ASSISTANT: Could you please provide the airport codes?

USER: The airport codes are MCO and PHL.

ASSISTANT: Sorry, there are no flights available on your dates. Thank you for approaching us.

USER: It's ok, not a problem with that. I will choose some other source to travel. Anyways thank you for helping me.