You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am David Jones from San Francisco. I have to attend my sister's marriage in Detroit, so I am searching for the flight. Can you please help me?

ASSISTANT: Yes, I can help you.

USER: Thank you.

ASSISTANT: Can you tell me your travelling dates?

USER: My planned travelling dates should be 06/30 and 07/02.

ASSISTANT: Ok, can I know your nearest airport codes?

USER: The nearest airport codes to my desired locations are SFO and DTW.

ASSISTANT: Give me a moment.

USER: Ok, I will wait for your response.

ASSISTANT: I have found a flight ticket with a price of 100 and 1 connection.

USER: Yes, I am ok with this flight. Please proceed with ticket booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for spending your time in booking my flight ticket.

ASSISTANT: Thank you for consulting us.

USER: You are welcome.