You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you help me in booking from BOS to PHX?

ASSISTANT: Sure, may I know your name please?

USER: My name is Alexander Rodriguez.

ASSISTANT: Now share your travel dates please?

USER: My travelling dates are from Mar 2 to Mar 4.

ASSISTANT: Do you have any other preferences?

USER: I prefer normal-cost airline.

ASSISTANT: Thanks for waiting. Sorry presently there is no availability of a normal-cost airline.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you.