You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Deborah Jones.

ASSISTANT: How may I help you?

USER: I would like to book a ticket from ORD to SFO, can you please help me out?

ASSISTANT: May I know your travelling dates?

USER: I am travelling on these dates May 17th and 19th.

ASSISTANT: May I know your time preferences?

USER: I prefer return time in the evening.

ASSISTANT: Do you need any connected flight?

USER: I need a single connected flight.

ASSISTANT:  Is there any other preferences for you?

USER: I don't have any other preferences.

ASSISTANT: Are you comfortable with any class?

USER: I don't have any class preference.

ASSISTANT: Sorry no reservation found as per your requirements.

USER: Ok no problem, thank you for your services.

ASSISTANT: There are no flights found. Thank you for reaching us.

USER: No issues, thank you.