You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David Clark.

ASSISTANT: Can you please let me know how may I help  you?

USER: I would like to book a ticket to New York for business meet, can you please help me out?

ASSISTANT: Yes, I can help you with the ticket booking. Can you please help me with travel dates?

USER: I am travelling on these dates 06/06 and 06/08.

ASSISTANT: Ok, which airports do you prefer to travel?

USER: I am flying from OAK to JFK.

ASSISTANT: Ok, please give me a minute.

USER: Sure, take your time. Make sure my price limit is 500.

ASSISTANT: Sorry for the trouble, there are no flights available with in your budget.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for choosing us. Have  a nice day.