You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want connecting from PHL. Can you please help me in booking my flight ticket?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My planned dates are Dec 17 and Dec 19.

ASSISTANT: Where are you heading to?

USER: I am heading to IAD.

ASSISTANT: Do you have any airlines preference?

USER: I prefer normal cost airline.

ASSISTANT: Is there any specific time bound flight are you looking for depart and return?

USER: No.

ASSISTANT: May I know your name to proceed further with the booking?

USER: Myself Margaret martin.

ASSISTANT: Do you have any other preference?

USER: No.

ASSISTANT: We don't have any normal cost airline's flight for your journey details.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for checking it with us.