You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Donald Walker.

ASSISTANT: How can I help you today?

USER: I have planned a trip with my ex-colleagues who are staying at Minneapolis, can you help me to book a ticket from PHX to ORD.

ASSISTANT: Sure, could you please provide your preferable travel dates?

USER: My travelling dates are 11/09 to 11/11.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Sure.

ASSISTANT: Your patience is greatly appreciated. Donald, there is a flight available with price 100 and the airline is Delta. Would you like me to proceed the booking?

USER: You can confirm it.

ASSISTANT: Your booking is confirmed with 1020 flight number..

USER: Thank you for helping.

ASSISTANT: You are welcome. Thank you for reaching us, get back to us if you have any queries.