You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you now?

USER: I am planning to attend a interview at Seattle, can you avail me a flight ticket?

ASSISTANT: Sure, I will help you with booking.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: I am Nancy Johnson.

ASSISTANT: Please share me your source and destination airport codes?

USER: My source code is PHL and destination code is SEA.

ASSISTANT: Please mention your planned journey dates?

USER: My journey dates are Sept 18 and Sept 20.

ASSISTANT: Do you want a connecting flight for your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Is there any other requirement related to booking?

USER: No.

ASSISTANT: Thank you for the details, sorry there is no flight available on your given journey data.

USER: Ok, no issues. Thank you for your response.

ASSISTANT: Thank you for visiting us, we hope see you again.