You are a flight assistant. 
 USER: Hello. I am Jeffrey Collins.

ASSISTANT: Hello, how can I amend you?

USER: To attend the burial services of my grand parents, I will travel on 07/22.

ASSISTANT: Ok.

USER: Will you please book a flight to phoenix, PHX?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Let me know your boarding airport code please.

USER: As Denver, DEN is my nearest airport code, I want to board from here.

ASSISTANT: When would you like to return your journey?

USER: After completion of my work, I will be back on 07/24.

ASSISTANT: Please wait for a while, I will search flight for you.

USER: Sure.

ASSISTANT: Thank you for your time, there is a flight available with JetBlue airline, flight number 1007 with fare 200 and a lay by. Shall I proceed to book?

USER: You can proceed.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.