You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Sandra Williams here. Reserve a flight ticket to LAS - SFO.

ASSISTANT: Sure, can you help me with your travelling dates?

USER: My travel dates are 05/25 and 05/27.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: I have found a flight-1009 of UA airlines, shall I proceed with booking?

USER: You can book this flight.

ASSISTANT: Your ticket has been booked, have a safe journey.

USER: Thanks I appreciate your response.

ASSISTANT: Welcome.