You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Raymond Scott, can you find a flight on 04/16?

ASSISTANT: Sure. Some of airlines are available on the date what you have provided.

USER: Ok.

ASSISTANT: Your want me to book a flight ticket for you?

USER: Yes, please book a flight from LAS to ORD.

ASSISTANT: Ok, please wait for a while. Would you like to have a return ticket too?

USER: Please book a return ticket on 04/18. Did you find any flight for me?

ASSISTANT: We have a ticket available on your departure date but I'm sorry there is no ticket for you on your return date. Would you like me to book a ticket on your departure date?

USER: That's fine, not an issue. Thank you for your help.

ASSISTANT: Sorry for the inconveniences. Thank you and have a nice day.