You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: Can you please help me in booking a flight ticket from IAD to PHL?

ASSISTANT: Sure, May I know your travelling dates?

USER: My planned journey dates are Feb 04 and Feb 06.

ASSISTANT: Do you have any airline preference?

USER: I prefer normal cost airline.

ASSISTANT: Do you have any other preferences?

USER: I need a flight having single connection.

ASSISTANT: May I know your name?

USER: My name is Raymond Garcia.

ASSISTANT: Thanks for your details, there are no flights found on your data.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you.