You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am John Wilson.

ASSISTANT: How may I guide you today?

USER: I want to travel from LAX to PHL. Can you book a flight ticket for me?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable journey dates?

USER: I want to travel on 11/14 and 11/16.

ASSISTANT: Please wait for a minute. I am sorry to say that there is no flight found.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for contacting us.