You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best support you now?

USER: Can you help me to book a flight ticket from DEN to LAX?

ASSISTANT: Kindly mention your travelling dates?

USER: Ok, please book a ticket for the dates Jan 27th and Jan 29th respectively.

ASSISTANT: May I know you name?

USER: My name is John Garcia.

ASSISTANT: Is there any other specifications regarding your journey?

USER: Yes, please book a flight which has single connection limit.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry John Garcia, we haven't found any flights based on your desired specifications.

USER: That is ok, thank you for providing the information.

ASSISTANT: Thanks for reaching us.