You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am looking for a direct flight for my journey, can you please find out a flight?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please help me with your planned travelling dates.

USER: Sure, my departure is on Jan 21 and please book my return ticket on Jan 23.

ASSISTANT: Please help me with your depart and arrival airport codes.

USER: Sure, I want to travel from MSP to IAD.

ASSISTANT: Please help me with your name.

USER: Sure, my name is Carolyn Lee.

ASSISTANT: Do you have any other preferences in your journey?

USER: I am comfortable to travel in a normal cost airline.

ASSISTANT: Please allow me a minute.

USER: Sure, take your time.

ASSISTANT: Carolyn Lee, I am really sorry to inform that there are no flights available for your journey.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey. Thank you for checking.

ASSISTANT: Thank you for reaching us. Have a good time.