You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Dennis Roberts. I am planning to go for my sister's wedding at San Francisco, SFO.  Can you please book a ticket on 10/10?

ASSISTANT: Sure, when your willing to return?

USER: I will return on 10/12.

ASSISTANT: help me with your source point?

USER: Origin code is Phoenix, PHX.

ASSISTANT: How much can you afford for your flight ticket?

USER: I can afford up to 200.

ASSISTANT: We found a connecting flight in Frontier airline with flight 1027 and fare 100. Shall I reserve it?

USER: You can proceed.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for reaching us.