You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to attend a marriage in Chicago, can you help me in booking a ticket?

ASSISTANT: Sure, I am here to help you, before may I know your airport codes?

USER: I want to travel from EWR to ORD.

ASSISTANT: Ok, can I have your travelling dates to find a flight for you?

USER: My travel dates are 10/31 and 11/02.

ASSISTANT: May I know your name in the meanwhile?

USER: I am Deborah Brown.

ASSISTANT: Thanks for giving your name, please wait a moment I will revert you back with the available flight details.

USER: Ok.

ASSISTANT: Sorry for the inconvenience Brown, We don't have a flight according to your information.

USER: No problem, I will try in another airlines. Thank you for your information.

ASSISTANT: Welcome, have a nice day.