You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Linda Thomas from Oakland.

ASSISTANT: OK.

USER: I need to attend a business meeting in Chicago so please help me with flight ticket booking.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please help me with your airport codes?

USER: Sure, I would like to travel from OAK to ORD as these are very much near to my locations.

ASSISTANT: When you are willing to travel?

USER: Sure, I have planned my travel dates as 04/13 and 04/15.

ASSISTANT: Do you have any specifications?

USER: Yes, I need connection 1.

ASSISTANT: OK, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting.

USER: It's ok.

ASSISTANT: Sorry to say you, there is no flights found with your specifications. Thank you for reaching us, have a good day.

USER: Oh! It is sad to hear, any way, thank you for your time.

ASSISTANT: Thank you.