You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: This is Jerry Parker, could you please help me to book a flight ticket?

ASSISTANT: Sure Parker, let me know your airport codes?

USER: My origin airport code is WA-SEA and destination code is PA-PHL.

ASSISTANT: Can I know your travel dates?

USER: OK, my travel date is 07/05 and return would be on 07/07.

ASSISTANT: Do you have any other additional requirements?

USER: Yes. I need single connection flight with a price limit of 5000.

ASSISTANT: Sorry Parker, there is no flight with your details.

USER: OK that is fine, thank you for your help.

ASSISTANT: Thank you.