You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Melissa Hall.

ASSISTANT: How may I aid you?

USER: I have a meeting to attend at Chicago. Can you help me in booking a ticket from OAK to ORD?

ASSISTANT: Sure, may I know your planned dates of your journey?

USER: My planned journey dates are 11/21 and 11/23.

ASSISTANT: Please wait a moment.

USER: Ok, take your time.

ASSISTANT: There is a flight with Southwest airlines available with price 100. Shall I book the ticket for you?

USER: Please book the ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1011.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us.