You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Debra Walker. I want to book a flight ticket within my fare 500. Will you help me in flight booking?

ASSISTANT: Sure, may I know your dates of travelling?

USER: I am planning to fly on 05/25 and my return on 05/27.

ASSISTANT: Could you please help me by providing your airport codes?

USER: I am planning to attend my friend birthday party in Park Central Hotel in NY - EWR and my origin from WA - SEA.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Sorry, no flights were available in your preferences. Thank you for contacting us.

USER: Not an issue. Thank you, for your service.