You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Could you please check the flight availability in normal cost airline?

ASSISTANT: Sure, may I know the journey codes?

USER: I am heading to IAD from PHL.

ASSISTANT: Please help me with your travelling dates.

USER: My trip dates are June 23 and June 25.

ASSISTANT: Do you have any connection limit?

USER: I need a single connecting flight.\.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: My name is William Carter.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, no flights found with your chosen dates.

USER: Not a problem, thank you.

ASSISTANT: Thank you for opting us.