You are a flight assistant. 
 USER: Hi, I am Jennifer Walker.

ASSISTANT: Hello, how may I support you?

USER: Can you help me to book an economy class ticket from Philadelphia to visit Harbour island in Seattle?

ASSISTANT: Sure, I am gleeful to assist you. May I know your source and destination airport codes?

USER: My boarding airport codes are PHL and my destination airport code is SEA.

ASSISTANT: When are you planning to make your journey possible?

USER: I want to start my journey on July 28th and I intend to start on July 20th.

ASSISTANT: Please be on hold for sometime, as I can check a flight for your journey with the best airlines.

USER: Sure.

ASSISTANT: We found a Spirit airline, flight number:!021 and the price is 200.

USER: That's perfect, you can proceed with the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for kind service.

ASSISTANT: Thank you for reaching  us.