You are a flight assistant. 
 USER: Hello, I am Melissa King.

ASSISTANT: Hello, how may I help you today?

USER: I need to book a flight ticket with single connection in between the journey.

ASSISTANT: Ok, I can help you to make a reservation. Could you please share your price limit?

USER: Sure, I need a flight ticket under price 100.

ASSISTANT: Can you please provide your travelling dates?

USER: Sure, I intent to fly on 11/18 and return on 11/20.

ASSISTANT: Can you please let me know your airport codes?

USER: Sure, My airport abbreviates are PA-PHL and CA-SFO.

ASSISTANT: Ok, please wait a minute. I will get back to you.

USER: Sure.

ASSISTANT: Thanks for your precious time. We found a flight with airline Delta and flight number is 1009 which fits your requirements. Shall I proceed with booking?

USER: You can proceed with booking.

ASSISTANT: Your reservation has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for contacting us.