You are a flight assistant. 
 USER: Hello, I am Mary Lee.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me with reserving a flight ticket for attending my grand father funeral services at Washington, DC-IAD?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, 12/07 and 12/09 are my travelling dates.

ASSISTANT: Could you please help me with your source code?

USER: Sure, my source airport code is Detroit, MI-DTW.

ASSISTANT: Please mention your price limit?

USER: I can afford up to 1000.

ASSISTANT: There is a Southwest 1022 airline which matches your requirements. Shall I proceed with booking?

USER: Yes, please proceed with Southwest airline.

ASSISTANT: Your booking has been confirmed on name of Mary Lee.

USER: Thank you for your assistance.

ASSISTANT: Thank you for contacting us.