You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you today?

USER: Donald Davis here. Will you please aid me in making an airline reservation from LGA to DEN?

ASSISTANT: Sure, please share me your trip dates.

USER: My travelling dates are Aug 7th and Aug 9th.

ASSISTANT: Do you need any specifications?

USER: I prefer to travel in an economy class.

ASSISTANT: May I know your airline preferences?

USER: No, I don't have any airline preference.

ASSISTANT: For booking, we need your good name. Please provide it.

USER: I already mentioned above.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.