You are a flight assistant. 
 USER: Hello. I am Margaret Hall.

ASSISTANT: Hello, how can I help you?

USER: Can you please book a ticket for me as I am planning to for science exhibition at Philadelphia, PHL?

ASSISTANT: Sure, please share me your travelling dates?

USER: Journey dates are 01/27 to 01/29.

ASSISTANT: Can I know your origin code?

USER: Source code is Dallas, DFW.

ASSISTANT: Thanks for your details. We found 1005 Delta airline with single connection and price of 100. Shall I proceed with booking?

USER: You can proceed. Thank you.

ASSISTANT: Your ticket has been booked. Thank you for reaching us.