You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I am planning to attend a business meeting at San Francisco, can you please help me in reserving a ticket?

ASSISTANT: Sure, Is there any price limit for you?

USER: Price limit for ticket is 500.

ASSISTANT: Ok, please mention your travelling dates.

USER: My travel dates are from 03/30 to 04/01.

ASSISTANT: Ok, specify your travelling airport codes with abbreviations.

USER: My travel starts from NY-EWR to CA-SFO.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Unfortunately, there is no flight available for your journey. Can I know your name please?

USER: Ok, thanks for your information. I am Margaret Turner.

ASSISTANT: Thanks for approaching us.

USER: Thank you.