You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ruth Mitchell here.

ASSISTANT: How may I assist you now?

USER: I have an appointment with my client in ORD. Can you please help me to book a flight from DEN?

ASSISTANT: Can you please share your preferable journey dates?

USER: Sure, my journey dates are from Jan 30 to Feb 1.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a connecting flight and my return time must be in the afternoon.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for reaching us.