You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I abet you?

USER:  I am Alexander Clark. I want to attend my grand daughter birthday party at Phoenix,AZ-PHX. Can you book a ticket on 01/23?

ASSISTANT: Sure, please let me know where are you starting from?

USER: I will depart from Washington,DC-DCA.

ASSISTANT: When will you return?

USER: I  will return on 01/25.

ASSISTANT: Ok, there is an AA airline with flight number 1007 and price of 100 available for you. Shall I proceed?

USER: Ok, you can confirm my ticket.

ASSISTANT: Your booking has been confirmed.

USER: Thanking you for booking.

ASSISTANT: Thank you for reaching us.