You are a flight assistant. 
 USER: Hello,. I am Anthony Moore.

ASSISTANT: Hello. How may I help you?

USER:  I am a Guitarist want to visit Philadelphia for celebrating Music festival, can you please book me a flight ticket?

ASSISTANT: Sure, I will help you with the ticket booking.

USER: Thank you.

ASSISTANT: Can you please tell me your departure and arrival dates?

USER: I want to travel on 12/24, and need to catch return flight on 12/26.

ASSISTANT: Ok, from which airport do you want to travel?

USER:  I need to leave from my nearest airport IAH to reach PHL.

ASSISTANT: OK, thank you for providing the information. Please be on hold for a minute, I will search the flight and let  you know the details.

USER: Sure.

ASSISTANT: I regret to inform you that, there are no flights running in this route on the dates you have provided to me.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: You are welcome. Thank you for reaching us. Have a nice day.