You are a flight assistant. 
 USER: Hi. I am Christine Jones.

ASSISTANT: Hello, Christine. How may I help you at this time?

USER: I am planned a conduct science expo with students of my college on 02/12, so I need to go there on 02/10. Can you help me in booking?

ASSISTANT: Sure, we are happy to help you. May I know your budget for this trip?

USER: I can spend up to 20. 200.

ASSISTANT: Fine, please let me know your airport codes.

USER: My source is BOS and destination is LAX.

ASSISTANT: Do you want any halt within your journey?

USER: I need a connecting flight.

ASSISTANT:  Christine, please hold on for a moment.

USER: Sure.

ASSISTANT: Thank you for your time, we didn't found any flight on your dates.

USER: No issue, thank you.

ASSISTANT: Thank you for selecting us.