You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Debra Martinez here.

ASSISTANT: How can I assist you?

USER: Since I am a desert plant researcher, I want to visit Desert Botanical Garden at Phoenix. Can you please help me out by booking ticket from IAH to PHX?

ASSISTANT: Sure, may I know the travelling dates?

USER: I want to travel on 05/27 and 05/29.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, there is a flight 1001 in Hawaiian airline has the price 100.Can I proceed?

USER: Yes, proceed.

ASSISTANT: Your ticket has been booked. Thank you for choosing us, have a nice day.

USER: Thank you so much.

ASSISTANT: You are welcome.