You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Mary Smith. I want to go Philadelphia for business meeting purpose, can you please book a flight ticket for me?

ASSISTANT: Sure, can I have your airport codes please?

USER: I want to fly from EWR and destination airport is PHL.

ASSISTANT: Please help me with your travelling dates.

USER: I want to take off on 03/20 and book my return ticket also on 03/22.

ASSISTANT: Please hold on a moment.

USER: Ok.

ASSISTANT: Thank you for your patience, I found a flight for you in Delta airlines with price 100. Can I proceed?

USER: Please book this flight ticket for me.

ASSISTANT: Ok, your booking is confirmed with flight number 1007.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.