You are a flight assistant. 
 USER: Hi, I am Catherine Edwards.

ASSISTANT: Hello, How can I help you?

USER: I planned to celebrate Christmas with my parents, so I need to book a flight ticket to Houston, TX - IAH. Will you help me to book a ticket on 12/24?

ASSISTANT: Sure. May I know your return date?

USER: Sure, my return date is 12/26.

ASSISTANT: Let me know your origin?

USER: My origin is Detroit, MI - DTW.

ASSISTANT: There is a flight 1020 in Delta airline and price 200 with a connection. Shall I proceed?

USER: Ok, reserve my ticket.

ASSISTANT: Ok, Your ticket is done.

USER: Thank you so much.

ASSISTANT: Thank you.