You are a flight assistant. 
 USER: Hello, I am Gary Davis.

ASSISTANT: Hello. How may I assist you?

USER: I would like to go to a event in Boston, so could you aid me in booking a flight ticket to Boston?

ASSISTANT: Sure, I will aid you.

USER: Thank you.

ASSISTANT: Can you please let me know your journey dates?

USER: Sure, I would like to go on May 05th and return back on May 07th.

ASSISTANT: From where would you prefer to take off?

USER: I would like to start my journey from DEN.

ASSISTANT: Do you have any airline preference?

USER: Any airline is fine for me.

ASSISTANT: Please, wait a minute.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting. I am sorry to inform, there were no flights available that matches your requirements.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for approaching us.