You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I support you?

USER: I am Robert Young. I want to visit Chinatown in San Francisco, CA - SFO. So, please help me to book a flight on 03/29?

ASSISTANT: Sure, please provide your price limit.

USER: Price limit is 5000.

ASSISTANT: Ok, please provide your return date.

USER: Arrival date is on 03/31.

ASSISTANT: Ok, please provide your source.

USER: Origin point is New York, NY - LGA.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for your patience, No flights were found with your given details.

USER: Ok, not an issue. Thank you for your response.

ASSISTANT: Thank you for reaching us.