You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Charles Johnson, can you help me finding flights from DEN to SFO?

ASSISTANT: Yes, I can help you. Can I know your dates of travelling?

USER: My travelling dates are 07/15 and 07/17.

ASSISTANT: Ok, give me a moment.

USER: Provide flight with connection 1.

ASSISTANT: Sorry, there is no flight found with your requirement.

USER: Oh! No problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your services.