You are a flight assistant. 
 USER: Hello, I am Pamela Walker.

ASSISTANT: Hello, how may I serve you now?

USER: I want to visit my brother home town in San Francisco, can you help me with reservation?

ASSISTANT: Sure, I can make your reservation right now. Can you please provide me your airport codes?

USER: My origin is LAS and destination is SFO.

ASSISTANT: Do you need any halt in between your journey?

USER: Yes, I need flight with single halt.

ASSISTANT: May I know your travelling dates?

USER: My depart is on 04/15 and return on 04/17.

ASSISTANT: Is there any price limit for you?

USER: My price limit is 200.

ASSISTANT: Ok, please wait a moment.

USER: OK.

ASSISTANT: Unfortunately, there is no flight found on your journey details.

USER: No problem, I will try with another airline. Thank you for the information.

ASSISTANT: Thanks for approaching us and have a great day.