You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Thomas Robinson here.

ASSISTANT: How can I help you Thomas?

USER: Please book me a ticket to DCA on 07/25, as it is an emergency to go.

ASSISTANT: Sure, may I know your source and return date?

USER: Yes, I want to depart from PHX and do return ticket on 07/27.

ASSISTANT: May I know your price and connection?

USER: I can bear upto 1000 for my ticket and please find a flight with 1 connection.

ASSISTANT: There is a UA 1000 airline which matches your requirements. Shall I proceed?

USER: Yes, please proceed.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.