You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am a magician, I have to host a show at Houston. So please book my ticket from Philadelphia.

ASSISTANT: Sure, may I know your respective airport codes please?

USER: I will be travelling from PHL to IAH.

ASSISTANT: Please provide me your planned trip dates.

USER: I will be travelling on 05/22 and returning on 05/24.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: May I know your name please?

USER: Benjamin Lee here.

ASSISTANT: Lee, there are no flights available at this moment.

USER: No problem, I will find an alternative way to travel.

ASSISTANT: Ok.

USER: Thank you for assisting me.

ASSISTANT: Thank you for contacting us.