You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Rachel Rodriguez here. I need your help in booking of a flight ticket between LAS and SFO, can you please help to book a flight on those locations?

ASSISTANT: Sure, I can help you in finding a flight ticket.

USER: Thank you.

ASSISTANT: Please share your planned travelling dates.

USER: Sure, I am planning to move on 10/25 and please book my return ticket on 10/27.

ASSISTANT: Ok, please wait a minute while I am checking the flight.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you, there is no flight found with the dates you have given.

USER: Oh! So sad to hear. Thank you for the information.

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