You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Raymond King, to explore Global Nature, I am travelling to many places. So, now can you help me in booking a ticket to SFO?

ASSISTANT:  Sure, Please let me know your travelling dates.

USER: 09/04 to 09/06 are travel dates.

ASSISTANT: Can I know your source date?

USER: Right now, I am at Chicago, IL-ORD.

ASSISTANT: Do you have any connection limit?

USER: Yes, it will be flexible for me if there is one connecting flight.

ASSISTANT: Please wait a while.

USER: The cost I can bear is 200.

ASSISTANT: Ok. Thanks for being waiting. We found a Delta airline,flight number:1008 and the price is 100.

USER: Ok, You can reserve a ticket.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks for assisting me.

ASSISTANT: Thank you for consulting us.