You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Brian Martinez here, can you please help me to reserve my ticket from SFO to PHL?

ASSISTANT: Can you please tell me your travelling daters?

USER: Sure, my preferable dates are from 12/18 to 12/20.

ASSISTANT: Ok, here is a flight ticket with 1007 flight number and Delta as airline.

USER: Ok, please book it.

ASSISTANT: Ok, your ticket is confirmed.

USER: Thank you for your help in booking my ticket.

ASSISTANT: Thank you for reaching us.