You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ashley Wright here.

ASSISTANT: In which way I can aid you today?

USER: I would like to attend a business meeting in Houston, can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, I can help you in booking flight ticket. Can you please mention your travel dates for booking flight ticket?

USER: Thank you. I am planning to move on 02/14 and please book my return ticket on 02/16.

ASSISTANT: May I know your airport code names for further process?

USER: I will prefer PHL and HOU as my origin and destination airport codes respectively.

ASSISTANT: Ok, please hold on a moment, I will check flight availability in this route.

USER: Ok, take your time.

ASSISTANT: Sorry for the inconvenience no flights available in this route as per your requested dates.

USER: Oh! Sad to hear that. Anyway, I will choose another alternative to go there. Thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Welcome.