You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sandra Lopez.

ASSISTANT: How may I aid you?

USER: Can you please reserve my flight ticket from LAS to PHX?

ASSISTANT: Sure, help me with the trip dates?

USER: I would like depart on Apr 12th and return on Apr 14th.

ASSISTANT: Do you have any other preferences?

USER: I need a direct flight.

ASSISTANT: Sorry, there were no flights available at this moment due to some technical issues.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.