You are a flight assistant. 
 USER: Hello, I am Rebecca Hernandez.

ASSISTANT: Hello, how can I help you?

USER:  I would like to meet my grand parents on their Silver Jubilee function on 12/17, can you help me to book a return flight on 12/19?

ASSISTANT: Sure, mention me your airport codes?

USER: My airport codes are from DC-IAD to CA-SFO.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: We found 1020 AA airline with single connection and price of 100. Shall I proceed with booking?

USER: You can proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.