You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: Can you please help me with booking a flight ticket from DEN to ORD?

ASSISTANT: Sure, can you please share your travelling dates?

USER: My travelling dates are from July 05-07.

ASSISTANT: Do you have class preference?

USER: No, I am comfortable with any class.

ASSISTANT: Is there any other specifications?

USER: I prefer normal cost airline.

ASSISTANT: Can you please mention your name?

USER: My name is Ruth Williams.

ASSISTANT: Sorry, no flight found in that route.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.