You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Me and my friends want to conduct a survey on literacy in villages. Can you please help me in reserving my flight from DEN to reach LGA?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Thank you, I want to travel on the dates of 9th and 11th in the month of Sept.

ASSISTANT: Do you have any preferences about flight connections?

USER: I prefer a single connecting flight for my journey.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Please mention your name.

USER: I am Susan Smith.

ASSISTANT: There is no flights found under your preferable details.

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

ASSISTANT: Welcome, have a great day.