You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Donald Walker.

ASSISTANT: How may I help you?

USER: I want to travel from LGA to LAS for business meeting, could you please help me to book my flight ticket?

ASSISTANT: Sure, I am glad to help you. Could you please provide me your travel dates?

USER: Sure, I will depart on 08/07 and return back on 08/09.

ASSISTANT: Thanks for waiting, there are no flights found on your travel dates?

USER: No problem, thank you for checking.

ASSISTANT: Thank you for reaching us.