You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Anthony Clark here. I want to travel from SFO to ORD. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, please share your planned travel dates.

USER: My planned  travel dates are from Jan 20 to Jan 22.

ASSISTANT: Do you have any specific class preference?

USER: No, I am comfortable with any class.

ASSISTANT: Please share your depart and return time.

USER: My depart time should be in the evening.

ASSISTANT: Sure, do you have any other preferences for your journey?

USER: I need a connecting flight in my journey.

ASSISTANT: Sorry, we didn't find any flight on given dates from you.

USER: Not a problem, anyway thank you for the information.

ASSISTANT: Thank you.