You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Rebecca Lewis.

ASSISTANT: How can I assist you today?

USER: Can you help me to book flight from PHX?

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

USER: My travelling dates are 10/09 and 10/11.

ASSISTANT: Ok, let me know your destination airport code?

USER: My preferred destination airport code is BOS.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Lewis, I did not find any flight on your preferred dates.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for choosing us and have a nice day.