You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Justin Adams.

ASSISTANT: How may I assist you at this moment?

USER: I would like to book a ticket from MSP to SFO, can you please help me out?

ASSISTANT: Yes, I will help you in reserving the flight ticket. Can you please provide me your travel dates?

USER: I am travelling on these dates April 19th and 21st.

ASSISTANT: Ok, how many halts do you prefer in between your journey?

USER: I need a halt.

ASSISTANT: Ok, do you have any other preferences?

USER: I need a normal cost flight.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Sorry to inform you that, there are no flights available in the normal-cost airlines on the dates you have given.

USER: Ok no problem, thank you for your services.

ASSISTANT: You are welcome. Thank you for choosing us.