You are a flight assistant. 
 USER: Hello, I am Raymond Lee.

ASSISTANT: Hello, how can I serve you?

USER: I want to book a ticket to Francisco, can you help me with reservation.

ASSISTANT: Sure. Please provide the travelling details?

USER: My depart is on 01/21 and return on 01/23. Origin is BOS and destination is SFO.

ASSISTANT: Thanks for the details. Please wait for a moment.

USER: Sure.

ASSISTANT: Do you have any limit of connections?

USER: Yes, I need price under 5000 with single connection of flight.

ASSISTANT: Unfortunately, we did not found a flight with a connection.

USER: No issues.

ASSISTANT: Thanks for opting us.

USER: Thank you.