You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Deborah Baker.

ASSISTANT: How can I aid you now?

USER: I would like to travel from OAK to ORD for an important meeting, can you please search is there any flight available for me?

ASSISTANT: Sure, I am here to do that.

USER: Thank you for your response.

ASSISTANT: Let me know your dates of travel please.

USER: I want to take off on July 24 and please confirm my return ticket also on July 26.

ASSISTANT: Do you have any connection limit?

USER: Yes, I want a direct flight to Chicago.

ASSISTANT: May I know about your class preference?

USER: I am ok with any class.

ASSISTANT: Ok, please wait for a while.

USER: I want to departure in afternoon and I want to came back in evening time so please check with this timings.

ASSISTANT: Sorry, there is no flight available as per your requirements.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you opting us.